Attrition-mill.



Patented Sept. Il, |900.

A. HEINE.

ATTBITIUN MILL.

(Application tiled. Har. 21, 1899.) (No Model.)

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`U iTED STATES PATENT OFFICE.

AUGUST HEINE, OF SILVER CREEK, NEV YORK, ASSIGNOR TO MARY L. ALLEN, OF SAME PLACE.

ATTRlTloN-MILL.

SPECIFICATION forming part of Letters Patent No. 657,656, dated September 11, 1900.

Appliotion filed March 2l, 1899. Serial No. 709,999. (N0 model.)

To a/ZZ whom. it may concern:

Be it known that I, AUGUST HEINE, a citizen of the United States, residing at Silver Creek, in the county of Chautauqua and State of New York, have invented new and useful Improvements in Attrition-Mills, of which the following is a specification.

This invention relates to a machine which is more particularly designed for reducing middlings which are so small that they cannot be further reduced satisfactorily by grinding-rolls. In order to perform this operation satisfactorily, it is necessary that the parts which operate upon the material should pul- Verize or reduce only the middlings, while the bran and germ particles, which are mixed with or adhere to the middlings, should substantially retain their size, so that they can be afterward separated from the iiour-producing parts by bolting or sifting. When grinding-rolls are set so closely together as to pulverize these small middlings, they also reduce the bran and germ particles, and this renders the reduction of such middlings unsatisfactory. Several different machines have heretofore been produced for performing thisV of attrition instead of grinding; and my invention has the object to produce such a machine which is simple in construction and effective in operation.

In the accompanying drawings, Figure 1l is a sectional elevation of myimproved attritionmill. Fig. 2 is a horizon-tal section in line2 2, Fig. l, looking upward and showing the under side of the top of theV inclosing casing. Fig. 3 is a similar View looking downward and showing the disk of the mill. Fig. l is a fragmentary vertical section in line et 4, Fig. l, on an enlarged scale.

Like letters of reference refer to like parts in the several iigures.

A represents the horizontal disk of themachine, Which is secured to the upper end of a spindle a, driven at its lower end by any suitable means-for instance, from a horizontal driving-shaft l) by a pair of bevel-wheels B B;

C is the stationary frame of the machine, in which the driving-shaft and the spindle are supported in any suitable manner. As

shown in the drawings, the driving-shaft is journaled in bearings c c' in the lower part of the frame, and the spindle rests by a collar d upon a bearing d, formed in a bridgepiece D.

E represents a cylindrical casing which surrounds the disk A and whichis secured by its bottom plate e upon the frame C. This bot-tom plate is provided with a depending central bearing e', in which the upper portion of the spindle is journaled.

F represents the horizontal top plate of the casing, which is provided with a raised cen; tral feed-chamber f, to which the mddlings are supplied by a feed-spoutf'.

The top g of the disk is flat, with the exception of its raised hub h, by which it is secured to the spindle. The upper peripheral face of the disk slopes 0r inclines outwardly or toward the surrounding casing E, forming a downwardly-converging annular space between this face of the disk and the casing. The iiat top of the disk is arranged at some distance below the top plate F, and this latter is provided with several depending wings l, which extend nearly to the top surface of the disk. These wings are curved or inclined in the direction in which the disk rotates, as indicated by the arrow in Fig. 4, and extend from the casing E inwardly over the tlat top surface of the disk. The lower peripheral face 7c of the disk slopes inwardly or towardthe axis of the disk and is much shorter than the upper outwardly-sloping face, while the bottom side Z of the disk is flat and provided with downwardly projecting Scrapers or sweeps m, by which the finished material is swept from the bottom plate e of the casing to the discharge-opening n, which is formed in said plate and leads to the discharge-spout N. The bottom plate e of the casing is provided on the inner side of the peripheral wall E of the casing with an annular rim, shoulder, or enlargement o. This internal rim or shoulder has its upper face sloping inwardly, like the lower peripheral face .lo of the disk, and arranged underneath said face of the disk, so that a narrow inwardly-inclined annular discharge-passage is formed between these two inclined faces. The height of this passage IOO is very small, as it is not much larger than the size of the gran liles of the finished mate# rial. In order to regulate the height of this passage as circumstances may require, the disk is made vertically adjustable by any suitable means. As shown in the drawings., the frame is provided for this purpose with an adjustable lever P, which is pivoted at onel end to the frame and adjustably supported on the frame at the other end by a screw-.rod and ndt pp. The spindle is provided above this lever with a collar q, which rests upon the lever, the latter being provided with a bearing q', which surrounds the spindlebelow this collar and upon which the collarrests, l when the raising of the lever lifts the lower collar d of the spindle from the fixed bearing CZ of the frame. By raising and loweringthe free end of the lever thesize of the yannu-lar; discharge-passage can be nicely adjusted.

The middlings are fed upon the Hat upper side of the rotating disk and aiettihrewnout wardlyvby1 the latter against the surrounding casing E. The mass of `material which iscontained within the casing rotates with the disk by frictional contact and .isrepeatedly driven against the under sidesof` the wingsv depending from the cover and squeezedand rubbed in passing through the converging; spaces between the wings and the iupper :sideI of the disk. The materialis further squeezed and rubbed, particle against'particle, inthe downwardly-converging .annular space between the ou twardl-y-sloping upperface ofthe l disk and the casing. During this rotaryvoutward and downward movement of thelmaterial in passing over the uppersurface of the disk and through the space between fthe .up` per peripheral face of the .disk to theannular discharge-opening the particles .of the material are mainly operated upon by rub-1 bing against each other and against the surfaces ofthe disk, wings, and casing andarel not exposed to a grinding action to any con-` siderable extent. This causes the reductionV of the friable flour-producing parts of .the middlings, while the 'particles of bran and germ, which are tough,.substantially retain their size. 'The inished material is finally discharged Vthrough the narrow annular `discharge-.opening between .the inclined lower face of the disk andthe internal shoulder of the casing and is bolted or vsifted. The inward direction of this discharge-opening retards the escape of the material and holds 4the material longer in the machine than it would otherwiseremain, since ythe flow ofthe material through this discharge-opening is resisted by the centrifugal action, `which must beovercome by the downward'pressure uponthe material in the space between the upper peripheral face of the disk and thecasing. This downward pressure is largely dueto the inclined wings of the casing, which deflect lthe rotating `material downwardly.

The under sides of the wings and the inner, sides of the casing are preferably corrugated,

ribbed, or roughened to cause lthe particles to turn vover and l('hange their respective positions in rotating with the disk.

I claim as my inventionl. In an attrition'mill,the combination with a rotary horizontal disk having a workingtop face and a working peripheral face, of a castingkwhi'ch surrounds the peripheral face of the disk and extends inwardly over the top yface thereof and which has a feed-opening above the 'top of the disk and a constricted annular discharge-passage around the disk and below the peripheral face thereof, wherelby vthe escape of the material is retarded by theconstri'cted discharge-passage and the material is subjected to attrition in passing outwardly between-.the casingand the top of the Adisk and in vpassingdownwardly betweenthe vcasing and the peripheral face lof the disk,

:substantially as set forth.

.2. In an attrition-mill the combination with .a rotarythorizontal disk having a working top face and a working peripheral face,of acasing which surrounds the peripheral face of thediskandlextends inwardly over the top face thereof and which has a feed-opening :ahovethe .top of the disk and-a con-stricted discharge-passage below the peripheral face fof the disk, and rubbing-wings arranged -in said casingabove thedisk and approaching the samein .the direction of its rotatiomsub- .stantially asset forth.

3. 'In' an attritionm=ill,the combination with yafrotary horizon-tal disk `having a working top face `and lan outwardly-.inclined peripheral working face, of a casing which surrounds :said peripheral face and forms therewith a downwardlyconverging space leading to a constricted .discharge-passage Abelow the peripheral face, said casing extending inwardly over Athe top face of the .disk and having a feed-opening above thefsame, substantially as .set forth.

4. In an attrition-mill,the combination with a rotary horizontal disk having a working top face and an outwardly-'inclined peripheral working face, of a casing .which surrounds said peripheral face and forms therewith a downwardlyvconverging space leading to a constricted discharge-passage below therperipheral face, said casing extending inwardly over the top face of the disk and having a feed-.opening above the same,.and deflectingkwings arranged vin said casing above the disk :and deecting the material into said downvardly-converging space, substantially as set orth.

5. -In an attriti0n-mill,the combination with a rotary horizontal disk having a working top face and ayperipheral working face, of a casing which surrounds said peripheral face and lwhich 4extends inwardly over said top face andalso inwardly alongthe under side of the disk below the vperipheral face thereof, forml ing an inwardly-.opening constricted .periphleral discharge-passage below the disk, substantially as set forth.

IOO

IIO

6. The combination with a rotary disk having an outwardly-inclined upper peripheral face and an inwardly-inclined lower peripheral face, of a surrounding casing having a feed-opening above said disk and having an inwardly inclined internal shoulder below the lower peripheral face of the disk, forming therewith an inwardly-inclined annular discharge-passage, substantially as set forth.

7. The combination with a rotary disk, having,r an upper, outwardly-inclined, peripheral face and a lower inwardly-extending face, of a surrounding easing having a feed-opening above said disk and having an internal shoulder below the lower face of the disk, forming x5 Witness my hand this 18th day of Mareh, 2o

AUGUST HEINE.

Witnesses:

EDWARD WILHELM, JNO. J. BONNER. 

